avaudioplayer swift tutorial

of the employee object is then broken by the REF1 = Nil statement in the code line, when it is referenced by 2. And so on, Ref2 = nil when its reference count is 1,REF3 = nil when its reference count is 0, when the reference count is 0, the employee object is freed.We can test to see the effect, if you set a breakpoint to step through debugging, you will find that the code runs out of line ⑨ after the console output:Employee Blake has been constructed successfully.The contents of the destructor

Generally, when we learn a new language, we write a Hello World applet. In swift, we can implement it through a line of content. Println ("Hello, world") // Note: Output HelloWorld If you have written C and OC code, this statement may be very familiar to you. In swift, such a line of code is a complete program, you do not need to import another function library for it, such as input/output or string hand

"; str.drawatpoint (CGPointMake (100, , withattributes:nil); //Picture cgcontextsetshadow (Context,cgsizemake (3,3), ten) varimg:uiimage=uiimage ( named: "8")!; nBsp;img.drawatpoint ( Cgpointmake (50,250)); //cgcontextdrawimage (context, CGRectMake (100,NBSP;250,NBSP;100,NBSP;100), IMG. Cgimage) Cgcontextsetshadow (Context,cgsizemake (0,0), 0) //Using path Paint letp1:cgmutablepathref=cgpathcreatemutable (); cgpathmovetopoint (p1,nil,50,250) cgpathadDlinetopoint (p1,nil,50,350) cgcontextad

I recorded the swift rookie introduction, welcome everyone to shoot bricks, there is any problem to leave a message here.Main content:Constants and variablesGazeSemicolonIntegerFloating point numberType safety and type determinationNumeric type literalNumeric type conversionsType aliasesBoolean valueMeta-groupOptions availableAssertionVideo address:Baidu Network disk: Http://pan.baidu.com/s/1mgkJ6TqPotato: http://www.tudou.com/programs/view/nZPgYV9Hqz

Import FOUNDATION//4, compound assignment operator var a = 1a + = 2//unary decrement operator (a numeric value before a symbol-called unary minus operator) let three = 3let Minusthree =-three//minusthree = -3let Plusthree =-minusthree//plusthree = 3//unary plus operator (unary plus operator (+) return value, no change) let Minussix = 6let Alsominussix = +minussix Alsominussix = 6//6, ternary conditional operator//Special NOTE: three-mesh operator (?) There must be at least one space in front of

General-Purpose StoryboardThe universal Stroyboard file is the first step toward a bright avenue for adaptive layout. Adapting the ipad and iphone layouts in a storyboard file is no longer a dream in iOS8. Instead of creating different storyboard files for different sizes of Apple mobile devices, we don't have to synchronize the contents of several storyboard files. This is really a wonderful thing.We open Xcode and create a new project:Select Ios\application\single View application to create a

str1 = "Hello" var str2 = "World" var str = str1 + str2var str2 = "\ (str1) HWC and the \ (str2)"//hello HWC and the world6 uppercase and lowercase conversionsStr.uppercasestring//hello World str.lowercasestring//hello World7 prefix suffix equalsBool Hasprefix (prefix:string)Bool Hassuffix (suffix:string)var str = "Hello HWC" str.hasprefix ("Hello")//truestr.hassuffix ("123")//falsevar str1 = "Jack"if str = = str1{println ("Equal")}8 processing substringsvoid Insert (NEWELEMEMT:CHARACTER,ATIND

Set Fillet buttonButton . Layer . bordercolor = Uicolor . Whitecolor (). Cgcolor ;Button. Layer . BorderWidth = 2;Button. Layer . Cornerradius = +;Set rounded border TextViewInputtextview . Layer . bordercolor = Uicolor (red:60/255, green:40/255, blue:129/255, alpha:1). Cgcolor ;Inputtextview . Layer . BorderWidth = 1;Inputtextview . Layer . Cornerradius = +; Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Say less nonsense, directly on the code:var Barsanim = Uiimageview (frame:self.view.frame);Barsanim . animationimages = Nsarray () as [anyobject]; barsanim. animationimages ?. Append (UIImage(named:"wave_000")!); barsanim. animationimages ?. Append (UIImage(named:"wave_001")!); barsanim. animationimages ?. Append (UIImage(named:"wave_002")!); barsanim. animationimages ?. Append (UIImage(named:"wave_003")!); barsanim. animationimages ?. Append (UIImage(named:"wave_004")!); barsanim. anim

Swift development tutorial -- Implementation of UITableView error does not conform to protocol 'uitableviewdatasource ', swiftprotocol Through practice, if we implement all the three protocol methods below, no error will be reported. Also note that! .Func tableView (tableView: UITableView, numberOfRowsInSection section: Int)-> Int { } Func tableView (tableView: UITableView, cellForRowAtIndexPath indexPat

Optional chainOriginal blog, reproduced please indicate the sourceMy blog AddressHttp://blog.csdn.net/hello_hwcAn optional chain provides an optional way to access an object's properties, methods, subscript scripts, and the return value of an optional chain must be an optional type.Merit: Substitution forced parsing (symbol!) , such as instance.location!. y), resulting in an execution-time error due to forced resolution of nil valuesMy experience: For a chain call, for example instance. Frame.or

Through practice, if the following three protocol methods are implemented, it will not be an error. Also need attention! The problem.func TableView (Tableview:uitableview, Numberofrowsinsection section:int), int{ }func TableView (Tableview:uitableview, Cellforrowatindexpath indexpath:nsindexpath), uitableviewcell{ }func TableView (Tableview:uitableview, Didselectrowatindexpath indexpath:nsindexpath) {Tableview.deselectrowatindexpath (Indexpath, Animated:true)}

http://www.imooc.com/learn/127"Fun to Swift" Web tutorial notes, you have updated according to the syntax of 2.1.I.1. Learn and familiarize yourself with the features of swift language through playground.2. A tuple declaration can have a name for each meta, which can then be used. Accessvar t= (x:1, y:2, Z:"hi") // var t: (int,int,string) var (a,_,_) =t //

Http://www.raywenderlich.com/76024/swift-table-view-animations-tutorial-drop-cardsStandard table view is a powerful and flexible way to render data, and in most cases your app uses some form of table view. However, one drawback is that you can't make too many customizations, and your app will drown in thousands of similar apps.In order to not use the same table view, we can use some animations to make your

Start learning watchkit!Updated on January 19, 2015: Tested by the Xcode 6.2 beta release; No project/code changes required. Remember to use the latest beta version of Apple!iOS developers rejoice-WatchKit is finally here!WatchKit is a development package for the new framework and related technologies for creating Apple Watch applications that Apple is accompanying with the Xcode 6.2 beta release.In this WatchKit tutorial, you will use

in the SWIFT project to build a random objective-c class, you will be prompted to generate a Bridging-header, click Yes, and then delete the Objective-c class just created, leaving only [project name]-bridging-header.h file. in the [project name]-bridging-header.h file write:#import Then write a function that generates MD5:class func md5string (str:string),string{ var cStr = (strasnsstring). utf8string var buffer =unsafemutablepointerUInt8 . A

height, or equal to 40% of the screen height, and the last rendered effect chooses the smaller of the two heights.Now you should notice that in the preview panel, the 4-inch horizontal screen shows the immediate response to the constraint changes you just made:Do you have a look at other size previews that are automatically updated? The answer is a must, so the Preview Assistant Editor is really a major improvement, a boon for programmers and designers!Since the example in this article is a wea

Directly on the code, as follows:/** * get the width and height of a string** @param text:nsstring* @param font:uifont** @return CGRect*/ classfunc gettextrectsize (text:nsstring, font: Uifont , Size: cgsize ),cgrect { var attributes = [nsfontattributename: Font] var option =nsstringdrawingoptions. Useslinefragmentorigin var rect:cgrect = text. boundingrectwithsize (Size, options:option, attributes:attributes, context: nil)println ("Rect:\ (rect)"); return rect;} Copyright NOTICE:

Swift getting started tutorial 15-extension)1. extensions DefinitionExtension is to add new functions to an existing class, struct, or enumeration. The extension does not need to obtain the source code of the original class.The extension is similar to the categories in objective C.Extended functions include1. Calculation attributes and calculation static attributes (you cannot add storage attributes and att

When doing the project, assume that when using the system's Uitabbarcontroller, the bottom tab itself defines the picture to be blue and gray. This is not the effect we want.Suppose you want to display your own defined, pressed and bouncing picture effects. At this time, the Tabbaritem needs to be changed.Here is a detailed demo sample:var itemnamearray:[String] = ["down_32","add_32", "Plane_32" , "Circle_32" ]var itemnameselectarray:[String] = ["down_click_32","Add_click_32" ,"plane_click_32",